Answer:
The total cost of the lunch, including the tip, without tax is $15.21.
Step-by-step explanation:
Given:
Joseph's lunch at a restaurant costs $13.00, without tax.
He leaves the waiter a tip of 17% of the cost of the lunch, without tax.
Now, to find the total cost of the lunch, including the tip, without tax.
Cost of the lunch without tax = $13.00.
Rate of tip on cost of lunch = 17%.
Now, to get the total cost of the lunch, including the tip, without tax:
$13.00 + 17%\ of $13.00.
[tex]=13+\frac{17}{100} \times 13[/tex]
[tex]=13+0.17\times 13[/tex]
[tex]=13+2.21[/tex]
[tex]=\$15.21.[/tex]
Therefore, the total cost of the lunch, including the tip, without tax is $15.21.